Update memory.md

[ckudera]

Update "show all the mapped area" since show_mapinfo() doesn't exist anymore. It was changed by @elicn in PR 1154

[xwings]

It would be better if we provide a proper exmaple. (i know i did not do it before). But since we are here, lets do it properly ?

something like that ?

for info_line in self.ql.mem.get_formatted_mapinfo():
                self.ql.log.error(info_line)

[ckudera]

@xwings Sorry, took me some days. I added your example. Please let me know if this meets your expectations.

[xwings]

Nice, thanks